cant find internet explorer anywher

i have had my laptop for 2 months now, i installed firefox 3 on it as i was told this is a better brower. So firefox is what i have bn using ever since, however, i tried to use ie explore and when i went to use it i couldn't find it anywhere on my computer, so i tried to download it and install it, and it installed fine, i restarted my computer to complete the installation. When it started back up i still couldn't find it, i have tried search>internet explorer, i have tried run>iexplorer.exe and i have tried going to local disk/program files/ and there is an internet explorer folder there but there is no iexplorer.exe inside it. PLEASE HELP ME AS IT IS DRIVING ME NUTS. I know some ppl will be wandering why i want internet explorer and the reason is this: i downloaded realplayer and it has the ability to download videos from the web, ie from megavideo, but when i use firefox i dont get the option to download the videos, and when i use my friends computer it allows me the option to download the video (he uses internet explorer.

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